subwoofer level settings on lsi 25

htrdln

So i was watching star trek into darkness,and decided to turn up my subwoofer level to 3/4
its ran via the rca cable sub out from a denon 4310 ci speakers are powered seperatly by an adcom gfa7805.
anyways about half way through the movie the sub woofers started popping. so i called polk today and they said i should never turn up the sub amp past half way.. has anyone heard of this before? why not just make the halfway mark as far as the nob will turn if that's the case?!?

rpf65

Yes.

Your internal amp in the sub isn't any different from the amp section of your AVR. If you turn the volume knob on your AVR to
3/4, you're just asking to destroy something, or many things. The same holds true for your sub. What the volume knob on the sub should be used for is to adjust the subs amplifier to more easily incorporate the rest of your system to it.

In other words, after you run the auto-cal program on an AVR you go to the speaker set-up page. Look at where the AVR set your sub, and if it's between +/- 5 dB, I would leave it alone. If your out of that range, use the subs volume knob to adjust it to get there, re-run the cal, and check it again.

If you get the volume knob on your sub about 1/2, and your still seeing -10dB on the set-up screen, you either have too much external noise during calibration, or a really crappy sub. If in the future you want a little more bass, go to the speaker set-up page and increase the sub setting by 1 or 2 dB.

What you need to do is turn the volume knob down, below half way, and re-run you cal program.